请问,我在串口中断函数里面加了led的函数,让它发送数据回电脑前led闪烁一下,可电脑发送后只有led亮没有闪,还收不到数据,仿佛程序就卡在串口中断函数中的GPIO_ResetBits(GPIOF,GPIO_Pin_9|GPIO_Pin_10)这一行,是怎么回事?是程序问题吗还是别的。想了很久都没想出来,求助。
#include "stm32f4xx.h"
#include "usart.h"
#include "delay.h"
#include "led.h"
#include "fengminqi.h"
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void My_USART1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ê1ÄüUSART1ê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate=115200;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1 ,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
GPIO_ResetBits(GPIOF,GPIO_Pin_9|GPIO_Pin_10);
delay_ms(200);
GPIO_SetBits(GPIOF,GPIO_Pin_9|GPIO_Pin_10);
delay_ms(200);
res=USART_ReceiveData(USART1);
USART_SendData(USART1,res);
}
}
int main(void)
{
LED_Init();
FENGMINQI_Init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
My_USART1_Init();
while(1);
}
把自己当成傻子,不懂就问,才能学得更多。
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